 | Texas Pennsylvanian FossilsDedicated to the Study of Pennsylvanian Fossils, Sponsored by Members of the Dallas Paleontological Society |
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Arthropod - Trilobites | Trilobites are a group of Paleozoic arthropods characterized by a hard shell divided into three sections. They are first seen in the fossil record in the Early Cambrian, reached their peak of diversity and abundance in the Ordovician and remained prolific and diverse through the Silurian and Devonian. By the Pennsylvanian they were in significant decline prior to their disappearance at the massive end Permian extinction event. In the Finis, only one genus is known and while fragments are not uncommon, whole specimens are extremely rare and often poorly preserved. Scroll through images or click to enlarge. Fossils are in alphabetical order by Genus. Collections are from Mike DeBrock (MD), Josh Hanley (JH), Dr. Peter Holterhoff (PH), Mark McKinzie (MM), John McLeod (JM), ), Dr. Ben Neuman (BN), Bob Williams (BW), Sveta Earnest (SE), and Rodney Wise (RW). All scales are shown in millimeters unless otherwise noted. |
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Images | Taxonomy/Stratigraphy/ | Images | Taxonomy/Stratigraphy/ |
Kingdom: Animalia Phylum: Arthropodia Class: Trilobita Order: Proetida Family: Phillipsiidae Genus: Ditomopyge Species: D. decurtata Finis Shale, Graham Formation Lost Creek Dam, Jacksboro, TX Collection: MM Note: According to Brezinski, 1999, D. decurtata is the only valid US Virgilian species | Kingdom: Animalia Phylum: Arthropodia Class: Trilobita Order: Proetida Family: Phillipsiidae Genus: Ditomopyge Species: D. scitula Finis Shale, Graham Formation Lost Creek Dam, Jacksboro, TX Collection: JH, MM Note: According to Brezinski, 1999, D. decurtata is the only valid US Virgilian species |
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